[libav.git] / libav / avienc.c

/*
 * AVI encoder.
 * Copyright (c) 2000 Fabrice Bellard.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include "avformat.h"
#include "avi.h"

/*
 * TODO: 
 *  - fill all fields if non streamed (nb_frames for example)
 */

typedef struct AVIIndex {
    unsigned char tag[4];
    unsigned int flags, pos, len;
    struct AVIIndex *next;
} AVIIndex;

typedef struct {
    offset_t movi_list, frames_hdr_all, frames_hdr_strm[MAX_STREAMS];
    int audio_strm_length[MAX_STREAMS];
    AVIIndex *first, *last;
} AVIContext;

offset_t start_tag(ByteIOContext *pb, char *tag)
{
    put_tag(pb, tag);
    put_le32(pb, 0);
    return url_ftell(pb);
}

void end_tag(ByteIOContext *pb, offset_t start)
{
    offset_t pos;

    pos = url_ftell(pb);
    url_fseek(pb, start - 4, SEEK_SET);
    put_le32(pb, (UINT32)(pos - start));
    url_fseek(pb, pos, SEEK_SET);
}

/* Note: when encoding, the first matching tag is used, so order is
   important if multiple tags possible for a given codec. */
CodecTag codec_bmp_tags[] = {
    { CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
    { CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
    { CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
    { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
    { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') },
    { CODEC_ID_MPEG4, MKTAG('d', 'i', 'v', 'x') },
    { CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0') },
    { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
    { CODEC_ID_MPEG4, MKTAG('x', 'v', 'i', 'd') },
    { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 's') },
    { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
    { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
    { CODEC_ID_MPEG4, MKTAG('m', '4', 's', '2') },
    { CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3') }, /* default signature when using MSMPEG4 */
    { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') }, 
    { CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') }, 
    { CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') }, 
    { CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') }, 
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') }, 
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') }, 
    { CODEC_ID_DVVIDEO, MKTAG('D', 'V', 'S', 'D') }, 
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') }, 
    { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') }, 
    { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') }, 
    { CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') }, 
    { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
    { 0, 0 },
};

unsigned int codec_get_tag(const CodecTag *tags, int id)
{
    while (tags->id != 0) {
        if (tags->id == id)
            return tags->tag;
        tags++;
    }
    return 0;
}

int codec_get_id(const CodecTag *tags, unsigned int tag)
{
    while (tags->id != 0) {
        if (tags->tag == tag)
            return tags->id;
        tags++;
    }
    return 0;
}

unsigned int codec_get_bmp_tag(int id)
{
    return codec_get_tag(codec_bmp_tags, id);
}

/* BITMAPINFOHEADER header */
void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, CodecTag *tags)
{
    put_le32(pb, 40); /* size */
    put_le32(pb, enc->width);
    put_le32(pb, enc->height);
    put_le16(pb, 1); /* planes */
    put_le16(pb, 24); /* depth */
    /* compression type */
    put_le32(pb, codec_get_tag(tags, enc->codec_id));
    put_le32(pb, enc->width * enc->height * 3);
    put_le32(pb, 0);
    put_le32(pb, 0);
    put_le32(pb, 0);
    put_le32(pb, 0);
}

void parse_specific_params(AVCodecContext *stream, int *au_byterate, int *au_ssize, int *au_scale)
{
    switch(stream->codec_id) {
    case CODEC_ID_PCM_S16LE:
       *au_scale = *au_ssize = 2*stream->channels;
       *au_byterate = *au_ssize * stream->sample_rate;
        break;
    case CODEC_ID_PCM_U8:
    case CODEC_ID_PCM_ALAW:
    case CODEC_ID_PCM_MULAW:
        *au_scale = *au_ssize = stream->channels;
        *au_byterate = *au_ssize * stream->sample_rate;
        break;
    case CODEC_ID_MP2:
        *au_ssize = 1;
        *au_scale = 1;
        *au_byterate = stream->bit_rate / 8;
    case CODEC_ID_MP3LAME:
        *au_ssize = 1;
        *au_scale = 1;
        *au_byterate = stream->bit_rate / 8;    
    default:
        *au_ssize = 1;
        *au_scale = 1; 
        *au_byterate = stream->bit_rate / 8;
        break;
    }
}

static int avi_write_header(AVFormatContext *s)
{
    AVIContext *avi = s->priv_data;
    ByteIOContext *pb = &s->pb;
    int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
    AVCodecContext *stream, *video_enc;
    offset_t list1, list2, strh, strf;

    put_tag(pb, "RIFF");
    put_le32(pb, 0); /* file length */
    put_tag(pb, "AVI ");

    /* header list */
    list1 = start_tag(pb, "LIST");
    put_tag(pb, "hdrl");

    /* avi header */
    put_tag(pb, "avih");
    put_le32(pb, 14 * 4);
    bitrate = 0;

    video_enc = NULL;
    for(n=0;n<s->nb_streams;n++) {
        stream = &s->streams[n]->codec;
        bitrate += stream->bit_rate;
        if (stream->codec_type == CODEC_TYPE_VIDEO)
            video_enc = stream;
    }
    
    if (!video_enc) {
        av_free(avi);
        return -1;
    }
    nb_frames = 0;

    put_le32(pb, (UINT32)(INT64_C(1000000) * FRAME_RATE_BASE / video_enc->frame_rate));
    put_le32(pb, bitrate / 8); /* XXX: not quite exact */
    put_le32(pb, 0); /* padding */
    put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
    avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */
    put_le32(pb, nb_frames); /* nb frames, filled later */
    put_le32(pb, 0); /* initial frame */
    put_le32(pb, s->nb_streams); /* nb streams */
    put_le32(pb, 1024 * 1024); /* suggested buffer size */
    put_le32(pb, video_enc->width);
    put_le32(pb, video_enc->height);
    put_le32(pb, 0); /* reserved */
    put_le32(pb, 0); /* reserved */
    put_le32(pb, 0); /* reserved */
    put_le32(pb, 0); /* reserved */
    
    /* stream list */
    for(i=0;i<n;i++) {
        list2 = start_tag(pb, "LIST");
        put_tag(pb, "strl");
    
        stream = &s->streams[i]->codec;

        /* stream generic header */
        strh = start_tag(pb, "strh");
        switch(stream->codec_type) {
        case CODEC_TYPE_VIDEO:
            put_tag(pb, "vids");
            put_le32(pb, codec_get_bmp_tag(stream->codec_id));
            put_le32(pb, 0); /* flags */
            put_le16(pb, 0); /* priority */
            put_le16(pb, 0); /* language */
            put_le32(pb, 0); /* initial frame */
            put_le32(pb, 1000); /* scale */
            put_le32(pb, (1000 * stream->frame_rate) / FRAME_RATE_BASE); /* rate */
            put_le32(pb, 0); /* start */
            avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
            put_le32(pb, nb_frames); /* length, XXX: fill later */
            put_le32(pb, 1024 * 1024); /* suggested buffer size */
            put_le32(pb, -1); /* quality */
            put_le32(pb, stream->width * stream->height * 3); /* sample size */
            put_le16(pb, 0);
            put_le16(pb, 0);
            put_le16(pb, stream->width);
            put_le16(pb, stream->height);
            break;
        case CODEC_TYPE_AUDIO:
            put_tag(pb, "auds");
            put_le32(pb, 1); /* tag */
            put_le32(pb, 0); /* flags */
            put_le16(pb, 0); /* priority */
            put_le16(pb, 0); /* language */
            put_le32(pb, 0); /* initial frame */
            parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
            put_le32(pb, au_scale); /* scale */
            put_le32(pb, au_byterate); /* rate */
            put_le32(pb, 0); /* start */
            avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
            put_le32(pb, 0); /* length, XXX: filled later */
            put_le32(pb, 12 * 1024); /* suggested buffer size */
            put_le32(pb, -1); /* quality */
            put_le32(pb, au_ssize); /* sample size */
            put_le32(pb, 0);
            put_le32(pb, 0);
            break;
        default:
            av_abort();
        }
        end_tag(pb, strh);

        strf = start_tag(pb, "strf");
        switch(stream->codec_type) {
        case CODEC_TYPE_VIDEO:
	    put_bmp_header(pb, stream, codec_bmp_tags);
            break;
        case CODEC_TYPE_AUDIO:
            if (put_wav_header(pb, stream) < 0) {
                av_free(avi);
                return -1;
            }
            break;
        default:
            av_abort();
        }
        end_tag(pb, strf);
        end_tag(pb, list2);
    }

    end_tag(pb, list1);
    
    avi->movi_list = start_tag(pb, "LIST");
    avi->first = NULL;
    avi->last = NULL;
    put_tag(pb, "movi");

    put_flush_packet(pb);

    return 0;
}

static int avi_write_packet(AVFormatContext *s, int stream_index,
                            UINT8 *buf, int size, int force_pts)
{
    AVIContext *avi = s->priv_data;
    ByteIOContext *pb = &s->pb;
    AVIIndex *idx;
    unsigned char tag[5];
    unsigned int flags;
    AVCodecContext *enc;
    
    enc = &s->streams[stream_index]->codec;

    tag[0] = '0';
    tag[1] = '0' + stream_index;
    if (enc->codec_type == CODEC_TYPE_VIDEO) {
        tag[2] = 'd';
        tag[3] = 'c';
        flags = enc->key_frame ? 0x10 : 0x00;
    } else {
        tag[2] = 'w';
        tag[3] = 'b';
        flags = 0x10;
    }
    if (enc->codec_type == CODEC_TYPE_AUDIO) 
       avi->audio_strm_length[stream_index] += size;

    if (!url_is_streamed(&s->pb)) {
        idx = av_malloc(sizeof(AVIIndex));
        memcpy(idx->tag, tag, 4);
        idx->flags = flags;
        idx->pos = url_ftell(pb) - avi->movi_list;
        idx->len = size;
        idx->next = NULL;
        if (!avi->last)
            avi->first = idx;
        else
            avi->last->next = idx;
        avi->last = idx;
    }
    
    put_buffer(pb, tag, 4);
    put_le32(pb, size);
    put_buffer(pb, buf, size);
    if (size & 1)
        put_byte(pb, 0);

    put_flush_packet(pb);
    return 0;
}

static int avi_write_trailer(AVFormatContext *s)
{
    ByteIOContext *pb = &s->pb;
    AVIContext *avi = s->priv_data;
    offset_t file_size, idx_chunk;
    int n, nb_frames, au_byterate, au_ssize, au_scale;
    AVCodecContext *stream;
    AVIIndex *idx;

    if (!url_is_streamed(&s->pb)) {
        end_tag(pb, avi->movi_list);

        idx_chunk = start_tag(pb, "idx1");
        idx = avi->first;
        while (idx != NULL) {
            put_buffer(pb, idx->tag, 4);
            put_le32(pb, idx->flags);
            put_le32(pb, idx->pos);
            put_le32(pb, idx->len);
            idx = idx->next;
        }
        end_tag(pb, idx_chunk);
        
        /* update file size */
        file_size = url_ftell(pb);
        url_fseek(pb, 4, SEEK_SET);
        put_le32(pb, (UINT32)(file_size - 8));

        /* Fill in frame/sample counters */
        nb_frames = 0;
        for(n=0;n<s->nb_streams;n++) {
            if (avi->frames_hdr_strm[n] != 0) {
                stream = &s->streams[n]->codec;
                url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET);
                if (stream->codec_type == CODEC_TYPE_VIDEO) {
                    put_le32(pb, stream->frame_number); 
                    if (nb_frames < stream->frame_number)
                        nb_frames = stream->frame_number;
                } else {
                    if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3LAME) {
                        put_le32(pb, stream->frame_number);
                        nb_frames += stream->frame_number;
                    } else {
                        parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
                        put_le32(pb, avi->audio_strm_length[n] / au_ssize);
                    }
                }
            }
       }
       if (avi->frames_hdr_all != 0) {
           url_fseek(pb, avi->frames_hdr_all, SEEK_SET);
           put_le32(pb, nb_frames); 
       }
        url_fseek(pb, file_size, SEEK_SET);
    }
    put_flush_packet(pb);
    return 0;
}

static AVOutputFormat avi_oformat = {
    "avi",
    "avi format",
    "video/x-msvideo",
    "avi",
    sizeof(AVIContext),
    CODEC_ID_MP2,
    CODEC_ID_MSMPEG4,
    avi_write_header,
    avi_write_packet,
    avi_write_trailer,
};

int avienc_init(void)
{
    av_register_output_format(&avi_oformat);
    return 0;
}
Commit	Line	Data
de6d9b64 FB	1	/*
de6d9b64 FB	2	* AVI encoder.
19720f15	3	* Copyright (c) 2000 Fabrice Bellard.
de6d9b64	4	*
19720f15 FB	5	* This library is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU Lesser General Public
	7	* License as published by the Free Software Foundation; either
	8	* version 2 of the License, or (at your option) any later version.
de6d9b64	9	*
19720f15	10	* This library is distributed in the hope that it will be useful,
de6d9b64	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
19720f15 FB	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19720f15 FB	13	* Lesser General Public License for more details.
de6d9b64	14	*
19720f15 FB	15	* You should have received a copy of the GNU Lesser General Public
	16	* License along with this library; if not, write to the Free Software
	17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
de6d9b64	18	*/
de6d9b64 FB	19	#include "avformat.h"
	20	#include "avi.h"
	21
	22	/*
	23	* TODO:
	24	* - fill all fields if non streamed (nb_frames for example)
	25	*/
	26
	27	typedef struct AVIIndex {
	28	unsigned char tag[4];
	29	unsigned int flags, pos, len;
	30	struct AVIIndex *next;
	31	} AVIIndex;
	32
	33	typedef struct {
86bec9a1 J	34	offset_t movi_list, frames_hdr_all, frames_hdr_strm[MAX_STREAMS];
86bec9a1 J	35	int audio_strm_length[MAX_STREAMS];
de6d9b64 FB	36	AVIIndex first, last;
	37	} AVIContext;
	38
	39	offset_t start_tag(ByteIOContext pb, char tag)
	40	{
	41	put_tag(pb, tag);
	42	put_le32(pb, 0);
	43	return url_ftell(pb);
	44	}
	45
	46	void end_tag(ByteIOContext *pb, offset_t start)
	47	{
	48	offset_t pos;
	49
	50	pos = url_ftell(pb);
	51	url_fseek(pb, start - 4, SEEK_SET);
8be1c656	52	put_le32(pb, (UINT32)(pos - start));
de6d9b64 FB	53	url_fseek(pb, pos, SEEK_SET);
	54	}
	55
	56	/* Note: when encoding, the first matching tag is used, so order is
	57	important if multiple tags possible for a given codec. */
	58	CodecTag codec_bmp_tags[] = {
95c79a24 J	59	{ CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
95c79a24 J	60	{ CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
de6d9b64 FB	61	{ CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
de6d9b64 FB	62	{ CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
58f26ba9 FB	63	{ CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') },
58f26ba9 FB	64	{ CODEC_ID_MPEG4, MKTAG('d', 'i', 'v', 'x') },
390dffc5 MN	65	{ CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0') },
	66	{ CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
	67	{ CODEC_ID_MPEG4, MKTAG('x', 'v', 'i', 'd') },
	68	{ CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 's') },
	69	{ CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
	70	{ CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
	71	{ CODEC_ID_MPEG4, MKTAG('m', '4', 's', '2') },
58f26ba9	72	{ CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
bb3debab GV	73	{ CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3') }, /* default signature when using MSMPEG4 */
	74	{ CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
	75	{ CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
9b030d9d MN	76	{ CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
9b030d9d MN	77	{ CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
020fcc94 FB	78	{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
020fcc94 FB	79	{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },
f20dca40	80	{ CODEC_ID_DVVIDEO, MKTAG('D', 'V', 'S', 'D') },
020fcc94	81	{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
1cbc2890 FB	82	{ CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
	83	{ CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
	84	{ CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },
bb15f7fd	85	{ CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
de6d9b64 FB	86	{ 0, 0 },
	87	};
	88
a266644f	89	unsigned int codec_get_tag(const CodecTag *tags, int id)
de6d9b64 FB	90	{
	91	while (tags->id != 0) {
	92	if (tags->id == id)
	93	return tags->tag;
	94	tags++;
	95	}
	96	return 0;
	97	}
	98
a266644f	99	int codec_get_id(const CodecTag *tags, unsigned int tag)
de6d9b64 FB	100	{
	101	while (tags->id != 0) {
	102	if (tags->tag == tag)
	103	return tags->id;
	104	tags++;
	105	}
	106	return 0;
	107	}
	108
	109	unsigned int codec_get_bmp_tag(int id)
	110	{
	111	return codec_get_tag(codec_bmp_tags, id);
	112	}
	113
	114	/* BITMAPINFOHEADER header */
502d105f	115	void put_bmp_header(ByteIOContext pb, AVCodecContext enc, CodecTag *tags)
de6d9b64 FB	116	{
	117	put_le32(pb, 40); /* size */
	118	put_le32(pb, enc->width);
	119	put_le32(pb, enc->height);
	120	put_le16(pb, 1); /* planes */
	121	put_le16(pb, 24); /* depth */
	122	/* compression type */
502d105f	123	put_le32(pb, codec_get_tag(tags, enc->codec_id));
de6d9b64 FB	124	put_le32(pb, enc->width * enc->height * 3);
	125	put_le32(pb, 0);
	126	put_le32(pb, 0);
	127	put_le32(pb, 0);
	128	put_le32(pb, 0);
	129	}
	130
86bec9a1 J	131	void parse_specific_params(AVCodecContext stream, int au_byterate, int au_ssize, int au_scale)
	132	{
	133	switch(stream->codec_id) {
	134	case CODEC_ID_PCM_S16LE:
	135	au_scale = au_ssize = 2*stream->channels;
	136	au_byterate = au_ssize * stream->sample_rate;
	137	break;
	138	case CODEC_ID_PCM_U8:
	139	case CODEC_ID_PCM_ALAW:
	140	case CODEC_ID_PCM_MULAW:
	141	au_scale = au_ssize = stream->channels;
	142	au_byterate = au_ssize * stream->sample_rate;
	143	break;
	144	case CODEC_ID_MP2:
	145	*au_ssize = 1;
	146	*au_scale = 1;
	147	*au_byterate = stream->bit_rate / 8;
5798368b J	148	case CODEC_ID_MP3LAME:
	149	*au_ssize = 1;
	150	*au_scale = 1;
	151	*au_byterate = stream->bit_rate / 8;
86bec9a1 J	152	default:
	153	*au_ssize = 1;
	154	*au_scale = 1;
	155	*au_byterate = stream->bit_rate / 8;
	156	break;
	157	}
	158	}
	159
de6d9b64 FB	160	static int avi_write_header(AVFormatContext *s)
de6d9b64 FB	161	{
c9a65ca8	162	AVIContext *avi = s->priv_data;
de6d9b64	163	ByteIOContext *pb = &s->pb;
86bec9a1	164	int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
de6d9b64 FB	165	AVCodecContext stream, video_enc;
	166	offset_t list1, list2, strh, strf;
	167
de6d9b64 FB	168	put_tag(pb, "RIFF");
	169	put_le32(pb, 0); /* file length */
	170	put_tag(pb, "AVI ");
	171
	172	/* header list */
	173	list1 = start_tag(pb, "LIST");
	174	put_tag(pb, "hdrl");
	175
	176	/* avi header */
	177	put_tag(pb, "avih");
	178	put_le32(pb, 14 * 4);
	179	bitrate = 0;
	180
	181	video_enc = NULL;
	182	for(n=0;n<s->nb_streams;n++) {
	183	stream = &s->streams[n]->codec;
	184	bitrate += stream->bit_rate;
	185	if (stream->codec_type == CODEC_TYPE_VIDEO)
	186	video_enc = stream;
	187	}
	188
	189	if (!video_enc) {
1ea4f593	190	av_free(avi);
de6d9b64 FB	191	return -1;
	192	}
	193	nb_frames = 0;
	194
8be1c656	195	put_le32(pb, (UINT32)(INT64_C(1000000) * FRAME_RATE_BASE / video_enc->frame_rate));
de6d9b64 FB	196	put_le32(pb, bitrate / 8); /* XXX: not quite exact */
	197	put_le32(pb, 0); /* padding */
	198	put_le32(pb, AVIF_TRUSTCKTYPE \| AVIF_HASINDEX \| AVIF_ISINTERLEAVED); /* flags */
86bec9a1	199	avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */
de6d9b64 FB	200	put_le32(pb, nb_frames); /* nb frames, filled later */
	201	put_le32(pb, 0); /* initial frame */
	202	put_le32(pb, s->nb_streams); /* nb streams */
	203	put_le32(pb, 1024 * 1024); /* suggested buffer size */
	204	put_le32(pb, video_enc->width);
	205	put_le32(pb, video_enc->height);
	206	put_le32(pb, 0); /* reserved */
	207	put_le32(pb, 0); /* reserved */
	208	put_le32(pb, 0); /* reserved */
	209	put_le32(pb, 0); /* reserved */
	210
	211	/* stream list */
	212	for(i=0;i<n;i++) {
	213	list2 = start_tag(pb, "LIST");
	214	put_tag(pb, "strl");
	215
	216	stream = &s->streams[i]->codec;
	217
	218	/* stream generic header */
	219	strh = start_tag(pb, "strh");
	220	switch(stream->codec_type) {
	221	case CODEC_TYPE_VIDEO:
	222	put_tag(pb, "vids");
	223	put_le32(pb, codec_get_bmp_tag(stream->codec_id));
	224	put_le32(pb, 0); /* flags */
	225	put_le16(pb, 0); /* priority */
	226	put_le16(pb, 0); /* language */
	227	put_le32(pb, 0); /* initial frame */
	228	put_le32(pb, 1000); /* scale */
	229	put_le32(pb, (1000 * stream->frame_rate) / FRAME_RATE_BASE); /* rate */
	230	put_le32(pb, 0); /* start */
86bec9a1	231	avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
de6d9b64 FB	232	put_le32(pb, nb_frames); /* length, XXX: fill later */
de6d9b64 FB	233	put_le32(pb, 1024 * 1024); /* suggested buffer size */
86bec9a1	234	put_le32(pb, -1); /* quality */
de6d9b64 FB	235	put_le32(pb, stream->width * stream->height * 3); /* sample size */
	236	put_le16(pb, 0);
	237	put_le16(pb, 0);
	238	put_le16(pb, stream->width);
	239	put_le16(pb, stream->height);
	240	break;
	241	case CODEC_TYPE_AUDIO:
	242	put_tag(pb, "auds");
86bec9a1	243	put_le32(pb, 1); /* tag */
de6d9b64 FB	244	put_le32(pb, 0); /* flags */
	245	put_le16(pb, 0); /* priority */
	246	put_le16(pb, 0); /* language */
	247	put_le32(pb, 0); /* initial frame */
86bec9a1 J	248	parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
	249	put_le32(pb, au_scale); /* scale */
	250	put_le32(pb, au_byterate); /* rate */
de6d9b64	251	put_le32(pb, 0); /* start */
86bec9a1	252	avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
de6d9b64 FB	253	put_le32(pb, 0); /* length, XXX: filled later */
	254	put_le32(pb, 12 * 1024); /* suggested buffer size */
	255	put_le32(pb, -1); /* quality */
86bec9a1	256	put_le32(pb, au_ssize); /* sample size */
de6d9b64 FB	257	put_le32(pb, 0);
	258	put_le32(pb, 0);
	259	break;
53cafac0	260	default:
42343f7e	261	av_abort();
de6d9b64 FB	262	}
	263	end_tag(pb, strh);
	264
	265	strf = start_tag(pb, "strf");
	266	switch(stream->codec_type) {
	267	case CODEC_TYPE_VIDEO:
502d105f	268	put_bmp_header(pb, stream, codec_bmp_tags);
de6d9b64 FB	269	break;
de6d9b64 FB	270	case CODEC_TYPE_AUDIO:
46a3d068	271	if (put_wav_header(pb, stream) < 0) {
1ea4f593	272	av_free(avi);
46a3d068 FB	273	return -1;
46a3d068 FB	274	}
de6d9b64	275	break;
53cafac0	276	default:
42343f7e	277	av_abort();
de6d9b64 FB	278	}
	279	end_tag(pb, strf);
	280	end_tag(pb, list2);
	281	}
	282
	283	end_tag(pb, list1);
	284
	285	avi->movi_list = start_tag(pb, "LIST");
	286	avi->first = NULL;
	287	avi->last = NULL;
	288	put_tag(pb, "movi");
	289
	290	put_flush_packet(pb);
	291
	292	return 0;
	293	}
	294
	295	static int avi_write_packet(AVFormatContext *s, int stream_index,
10bb7023	296	UINT8 *buf, int size, int force_pts)
de6d9b64 FB	297	{
	298	AVIContext *avi = s->priv_data;
	299	ByteIOContext *pb = &s->pb;
	300	AVIIndex *idx;
	301	unsigned char tag[5];
	302	unsigned int flags;
	303	AVCodecContext *enc;
	304
	305	enc = &s->streams[stream_index]->codec;
	306
	307	tag[0] = '0';
	308	tag[1] = '0' + stream_index;
	309	if (enc->codec_type == CODEC_TYPE_VIDEO) {
	310	tag[2] = 'd';
	311	tag[3] = 'c';
	312	flags = enc->key_frame ? 0x10 : 0x00;
	313	} else {
	314	tag[2] = 'w';
	315	tag[3] = 'b';
	316	flags = 0x10;
	317	}
86bec9a1 J	318	if (enc->codec_type == CODEC_TYPE_AUDIO)
86bec9a1 J	319	avi->audio_strm_length[stream_index] += size;
de6d9b64 FB	320
de6d9b64 FB	321	if (!url_is_streamed(&s->pb)) {
1ea4f593	322	idx = av_malloc(sizeof(AVIIndex));
de6d9b64 FB	323	memcpy(idx->tag, tag, 4);
	324	idx->flags = flags;
	325	idx->pos = url_ftell(pb) - avi->movi_list;
	326	idx->len = size;
	327	idx->next = NULL;
	328	if (!avi->last)
	329	avi->first = idx;
	330	else
	331	avi->last->next = idx;
	332	avi->last = idx;
	333	}
	334
	335	put_buffer(pb, tag, 4);
	336	put_le32(pb, size);
	337	put_buffer(pb, buf, size);
	338	if (size & 1)
	339	put_byte(pb, 0);
	340
	341	put_flush_packet(pb);
	342	return 0;
	343	}
	344
	345	static int avi_write_trailer(AVFormatContext *s)
	346	{
	347	ByteIOContext *pb = &s->pb;
	348	AVIContext *avi = s->priv_data;
	349	offset_t file_size, idx_chunk;
86bec9a1 J	350	int n, nb_frames, au_byterate, au_ssize, au_scale;
86bec9a1 J	351	AVCodecContext *stream;
de6d9b64 FB	352	AVIIndex *idx;
	353
	354	if (!url_is_streamed(&s->pb)) {
	355	end_tag(pb, avi->movi_list);
	356
	357	idx_chunk = start_tag(pb, "idx1");
	358	idx = avi->first;
	359	while (idx != NULL) {
	360	put_buffer(pb, idx->tag, 4);
	361	put_le32(pb, idx->flags);
	362	put_le32(pb, idx->pos);
	363	put_le32(pb, idx->len);
	364	idx = idx->next;
	365	}
	366	end_tag(pb, idx_chunk);
	367
	368	/* update file size */
	369	file_size = url_ftell(pb);
	370	url_fseek(pb, 4, SEEK_SET);
8be1c656	371	put_le32(pb, (UINT32)(file_size - 8));
86bec9a1 J	372
	373	/* Fill in frame/sample counters */
	374	nb_frames = 0;
	375	for(n=0;n<s->nb_streams;n++) {
	376	if (avi->frames_hdr_strm[n] != 0) {
	377	stream = &s->streams[n]->codec;
	378	url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET);
	379	if (stream->codec_type == CODEC_TYPE_VIDEO) {
	380	put_le32(pb, stream->frame_number);
	381	if (nb_frames < stream->frame_number)
	382	nb_frames = stream->frame_number;
	383	} else {
5798368b	384	if (stream->codec_id == CODEC_ID_MP2 \|\| stream->codec_id == CODEC_ID_MP3LAME) {
86bec9a1 J	385	put_le32(pb, stream->frame_number);
	386	nb_frames += stream->frame_number;
	387	} else {
	388	parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
	389	put_le32(pb, avi->audio_strm_length[n] / au_ssize);
	390	}
	391	}
	392	}
	393	}
	394	if (avi->frames_hdr_all != 0) {
	395	url_fseek(pb, avi->frames_hdr_all, SEEK_SET);
	396	put_le32(pb, nb_frames);
	397	}
de6d9b64 FB	398	url_fseek(pb, file_size, SEEK_SET);
	399	}
	400	put_flush_packet(pb);
de6d9b64 FB	401	return 0;
	402	}
	403
c9a65ca8	404	static AVOutputFormat avi_oformat = {
de6d9b64 FB	405	"avi",
	406	"avi format",
	407	"video/x-msvideo",
	408	"avi",
c9a65ca8	409	sizeof(AVIContext),
de6d9b64 FB	410	CODEC_ID_MP2,
	411	CODEC_ID_MSMPEG4,
	412	avi_write_header,
	413	avi_write_packet,
	414	avi_write_trailer,
de6d9b64	415	};
c9a65ca8 FB	416
	417	int avienc_init(void)
	418	{
	419	av_register_output_format(&avi_oformat);
	420	return 0;
	421	}